I was wonderig what size the stock pulleys are on the stock srt-6 ? I have seen pulley upgrades @ 185mm ` 181mm and 178mm , I have also seen a 160 something on here (the board) . My question is what pulley size is safe for an up grade for a street car ? What would be the best upgrade for a street driving car ? Thanks

 

154 is stock. the best bang for the buck now is rudy's 62 or eurocharged 61 mm supercharger pullies. theres really no need to mess with the crank pulley now that these are available.
if a crank pulley is what you want the 181 has the best power to use ratio

 

Understand that with the supercharger pulley as compared to the crank pulleys, the reverse is true, the smaller the pulley, the more power it will make.

 

we still run/recommend the 178's as it is the sweet spot for power/safety and will not lean out your air-fuel ratio